All the examples I have heard parallel our use of the "F" word. This is extendable to any usage - verb (joder), adjective (jodido/a), exclamation (Joder!), etc. In lighter cases it also serves as "screw, screw up, mess up," etc. Ex. "Man, you're screwed." --> "Hombre, estás jodido." All in all, I would avoid it unless you're around friends or people that generally don't mind vulgar language.
